Improvement in steam-boiler furnaces



N- PETFJIS. PHOTO-L THOGRAPHER WASHINGTON D C To all whom tenaz/,concerndfi @time I SA AC MO'RGAN,OF QU I NCY, I LLI-NDIS.

Letters Pate/nt 87,279, dated Febfrua/ry 23, 1869.

MPROVEMENT -IN' .STEAM-BOILER PURNACES.

The Schedule referred to in these Letters Patent and making ps rt of thesame.

. Be it known that I, ISAAC MORGAN, of Quincy, in the county of Adams,and State of Illinois, have invented a new and useful Improvement inFurnaces; and I do herebydeclare that the following is a full,

clear,a nd exact description thereof, which will enable others skilledin the art to make and use the same, reference. being had to theaccompanying "drawings, forming part of this specification. A

I This invention has for s object, to consume the gaseous products ofcombustion, escaping from the fur-v naces of' steam and other boilers,and consists in the .arrangement of a partition over the end of thebridgewall, and a' series of hot-air` tubes between the boilers, andprojectingA slightly through the partition, whereby the gaseous productsof combustion are directed in a broad sheet thro'ugh the contractedthroat formed by the bridge-Wall and partition, and, mingling with theintensely-heated air from the tubes, are consumed.

Figure 1 represents a longitudinal section of a steamboiler, through theline x x, g. 2.'

Figure 2 is a front view of the furnace, showing the boilers inposition, but with the front plate removed.

Figure1 3 is a vertical cross-section, through the line y y, fie Similarlettersoi' reference indicate like parts.

-A represents the boilers, 'which are of that class known asfluefboilers.

B representsthe fines. C C are supports, under the front end of theboilers. I) (iig. 1) represents .the grate-bars. E is the bridgevwall.

F is the'ash-pit. G is the combustion-chamber, and H is thesmoke-chamber. J represents a transverse plate or partition, whichfills-up the'space between the boilers, the outer sides .of the boilers,and the wall, so that the upper line of the narrow throat K, beneath theboilers, is parallel with the top' of the bridge-wall its entire length.

At the front end ofthe'boiler, directly over the fur- Y nace, there arethree or more air-tubes L, which convey heated air into thecombustionchamber G.

It is well known by those who are acquainted with the subject, thatwhere there' is nota suiicient quan' tity of atmospheric air or oxygen)supphed tothe burning fuel, carbonic-oxide gas is the result, which gas.

passes off and escapes from the ordinary chimney, car-4 rying with itlarge amounts of y carbon unconsurned.

'This gas is, ofcourse, generated at a high temperature, and if, whenvat that temperature, it is supplied with an additionalY quantity ofoxygen, its carbon is consumed, and fuel saved. This ladditionalquantity of oxygen I supply through the aiitubes L.

These tubes, it will be seen, pass over the fire at the front end of theboiler, and project slightly throughthe partition J, above the throat Kconsequently they are kept red hot, so thatthe air whichpasses throughthem becomes intensely heated before it is discharged into thecombustion-chamber.

The operation is as follows: The gaseous products of combustion risingfrom the furnace D, impin ge against the wall between thev boiler andsides enclosing them, and are thence directed in. currents tothepartition J, which' deflects them in a broad sheet through thecontracted throat K, at which point they are met by the intensely-heatedair from the tubes'L, and consumed'.

Thetubes L, atl the rear end of the boiler, are used simply as a meansfor*` inspecting the interior of the combustion-chamber.

I am 'aware that air has been introduced to the combustion-chamber ofsteam-boilers, through and also imf mediately behind the bridge-vialL-bymeans of pipes, or by openings in the bridge-wall, or behind it; butsuch arrangements I do not' claim, as they do not permit the heated airto thoroughly mingle with the gaseous products; but

What I do claim, and desirel to secure by Letters Patent,1is.

The described arrangement of the partition J and hot-air tubes L, withrelation to each other, the bridgewall, the furnace F, and the boiler A,for the purpose specified.

ISAAO MORGAN.

Witnesses Ass W. BLAKESLEY, JOSEPH SUMMER.

